Process for the separation of hollow glass microspheres from muds containing them
US7004333B2 · kind B2 · utility
15Cited by
4References
18Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 13, 2001 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Mar 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2996
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for recovering at least 70% of hollow glass microspheres having an average diameter, according to the ASTM D1214-1989, ranging from 5 to 200 μm contained in a mixture of drilling mud and cuttings which comprises: a) screening, if necessary, the mixture through one or more 5 to 20 mesh sieves; b) feeding the screened mixture to one or more cyclones and/or hydrocyclones arranged in series, each of which is fed with a volume flow-rate from 1.5 to 10 times higher than the maximum nominal operating value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.